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Shielding apparatus for a printed circuit board

  • US 4,739,453 A
  • Filed: 03/19/1987
  • Issued: 04/19/1988
  • Est. Priority Date: 03/20/1986
  • Status: Expired due to Term
First Claim
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1. A shielding apparatus for shielding electric circuitry mounted on a printed circuit board against interfering electric waves comprising:

  • a multi-layer printed circuit board having a circuit trace printed on a middle layer;

    a first circuitry block mounted on an outer surface of said multi-layer printed circuit board, said first circuitry block being electrically connected to said circuit trace, so that said first circuitry block is connected to at least one other circuitry block mounted on said multi-layer printed circuit board via said circuit trace; and

    metallic plate means covering said first circuitry block to thereby isolate said first circuitry block from said other circuitry block.

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